add: humidity (WIP)

vendor/periph.io/x/periph/host/beagle/green/green.go

@@ -0,0 +1,95 @@
+// Copyright 2018 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// Package green implements headers for the BeagleBone Green and BeagleBone
+// Green Wireless micro-computers.
+//
+// Reference
+//
+// https://beagleboard.org/green
+//
+// https://beagleboard.org/green-wireless
+//
+// Datasheet
+//
+// http://wiki.seeedstudio.com/BeagleBone_Green/
+package green
+
+import (
+	"errors"
+	"strings"
+
+	"periph.io/x/periph"
+	"periph.io/x/periph/conn/gpio"
+	"periph.io/x/periph/conn/pin"
+	"periph.io/x/periph/conn/pin/pinreg"
+	"periph.io/x/periph/host/distro"
+	"periph.io/x/periph/host/sysfs"
+)
+
+// Headers found on BeagleBone Green.
+var (
+	// I2C Groove port.
+	I2C_SCL gpio.PinIO = gpio.INVALID // GPIO13, I2C2_SCL, UART1_RTS, SPI1_CS1
+	I2C_SDA gpio.PinIO = gpio.INVALID // GPIO12, I2C2_SDA, UART1_CTS, SPI1_CS0
+
+	// UART Groove port connected to UART2.
+	UART_TX gpio.PinIO = gpio.INVALID // GPIO3, EHRPWM0B, I2C2_SCL, UART2_TX, SPI0_MISO
+	UART_RX gpio.PinIO = gpio.INVALID // GPIO2, EHRPWM0A, I2C2_SDA, UART2_RX, SPI0_CLK
+)
+
+// Present returns true if the host is a BeagleBone Green or BeagleBone Green
+// Wireless.
+func Present() bool {
+	if isArm {
+		return strings.HasPrefix(distro.DTModel(), "TI AM335x BeagleBone Green")
+	}
+	return false
+}
+
+// driver implements periph.Driver.
+type driver struct {
+}
+
+func (d *driver) String() string {
+	return "beaglebone-green"
+}
+
+func (d *driver) Prerequisites() []string {
+	return []string{"am335x"}
+}
+
+func (d *driver) After() []string {
+	return nil
+}
+
+func (d *driver) Init() (bool, error) {
+	if !Present() {
+		return false, errors.New("BeagleBone Green board not detected")
+	}
+
+	I2C_SDA = sysfs.Pins[12]
+	I2C_SCL = sysfs.Pins[13]
+	hdr := [][]pin.Pin{{pin.GROUND}, {pin.V3_3}, {I2C_SDA}, {I2C_SCL}}
+	if err := pinreg.Register("I2C", hdr); err != nil {
+		return true, err
+	}
+
+	UART_TX = sysfs.Pins[3]
+	UART_RX = sysfs.Pins[2]
+	hdr = [][]pin.Pin{{pin.GROUND}, {pin.V3_3}, {UART_TX}, {UART_RX}}
+	if err := pinreg.Register("UART", hdr); err != nil {
+		return true, err
+	}
+
+	return true, nil
+}
+
+func init() {
+	if isArm {
+		periph.MustRegister(&drv)
+	}
+}
+
+var drv driver

vendor/periph.io/x/periph/host/beagle/green/green_arm.go

@@ -0,0 +1,7 @@
+// Copyright 2018 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package green
+
+const isArm = true

vendor/periph.io/x/periph/host/beagle/green/green_other.go

@@ -0,0 +1,9 @@
+// Copyright 2018 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// +build !arm
+
+package green
+
+const isArm = false